fluorochrome-conjugated antibodies for 30 min at 4°C and
washed twice with ice-cold PBS containing 0.5% FCS. The following antibodies
were used: anti-CD3-PE (mouse, BD Biosciences, 555333), anti-CD5-FITC (mouse, BD
Biosciences, 555352), anti-CD14-PECy7 (mouse, ebioscience, 25–0149-42),
anti-CD19-APC (mouse, BD Biosciences, 555415), anti-CD27-PE (mouse BD
Biosciences, 555441), anti-CD38-APC (mouse, BD Biosciences, 555462),
anti-CD38-FITC (mouse, BD Biosciences, 555459). Surface protein expression was
detected by a BD FACSCalibur cell analyzer (BD Biosciences) and data were
analyzed using the FlowJo software.